[SIPForum-discussion] If TCP is used as transport then can we ignore sending of ACK?

[HM Kias]

Hi Nitisha Gupta,

An ACK is used to acknowledge  final response of an initial invite, also an
ack may contain application/sdp message body if the initial invite does not
contain the SDP parameters. Then the determination of end-to-end ACK or
hop-to-hop ACK by the proxy to send downstream to another proxy or UA is a
lso important.


So TCP or UDP is not the main concern.


Regards,




On Thu, Jul 28, 2011 at 4:24 PM, nitisha gupta <nitisha.gupta06 at gmail.com>wrote:

> Hi
>
> Can anyone explain :
>
> What is the use of ACK message in INVITE transaction? If TCP is used as
> transport then can we ignore sending of ACK?
>
> Thanks
> Nitisha
>
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-- 
HM Kias
91-9443467600
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